点击次数：

论文类型：期刊论文

发表时间：2018-08-01

发表刊物：IEEE TRANSACTIONS ON PLASMA SCIENCE

收录刊物：SCIE

卷号：46

期号：8

页面范围：3083-3089

ISSN号：0093-3813

关键字：Multibreak vacuum circuit breakers (VCBs); postarc current; transient recovery voltage (TRV); vacuum interrupters; voltage distribution (VD)

摘要：This paper proposes the equivalent circuit of postarc dynamic voltage distribution (PDVD) in multibreak vacuum circuit breakers (VCBs). The equivalent circuit is composed of controlled postarc sources, postarc resistors, and equivalent capacitors. The sheath growth and the postarc process of double-break VCBs are analyzed. The PDVD is divided into four processes: the initial transient recovery voltage (TRV) process, the oscillating TRV process, the stable TRV process, and the power-frequency voltage process, which can be analyzed by the equivalent circuit. The novel equivalent circuit of the PDVD in multibreak VCBs is gained by introducing the controlled postarc current source. The test platform is set up in the synthetic circuit. The postarc current, grading capacitor current, and the TRV are measured to analyze the PDVD in the above four processes. The test results verify the theoretical analysis. Therefore, the mechanism of the PDVD in multibreak VCBs is obtained and described by the equivalent circuit, which is useful to gain even voltage distribution and improve the breaking capacity of multibreak VCBs.